BTW, our design won’t allow us to convert the M3 into a M16 MGMC because of the way the rear troop compartment was modified to fold down. Implementing the M16 option would mean giving up our slide-mould design. Being that said, we may still produce a M16 someday!

Yes smurf , its the same gun mount . It had it 's own battery power for elevation and traverse when used on the trailer . Probably hooked up to vehicle power when mounted in truck or half track . Because it used those large " tomb stone " style ammo boxes , the sides of the half track had to fold down so the 4 gun version could traverse . M 16 built on M3 , M 17 built on M 5 . The Brits remove quite a few gun mounts and used the M 17 as personal carriers . I think it would make a nice expansion kit , extra M 16 hull ( Rubicon already as an extra hull for the M4 mortar HT ) gun mount , ammo cans crew and trailer . I ' ld buy one .